I'm thinking about 48V for a cargo trailer conversion with 7200Wh storage and 1200W solar, mainly for the ability to run a mini split heat pump system. The sensible option might be to settle for a 24V system as there are more RV appliance options for 12/24V. Just curious about 48V as it's more efficient. Split phase would give me some nice options on the mini split though - just gets really expensive.@mckennab inverter/chargers are largely displacing inverters.
3000 watts is on the small side for a 48 volt system.
What voltage do you require 120VAC@60hz, 120/240@60hz or something else?
Do you require hardwire or just built in outlets or both?
Any other requirements?
I'm thinking about 48V for a cargo trailer conversion with 7200Wh storage and 1200W solar, mainly for the ability to run a mini split heat pump system. The sensible option might be to settle for a 24V system as there are more RV appliance options for 12/24V. Just curious about 48V as it's more efficient. Split phase would give me some nice options on the mini split though - just gets really expensive.
Yes a lot to consider, but I think I'm probably going to go with 24V/3000W. Thanks for the good advice - hadn't considered the neutral/ground bond - I have a lot to learn - my thinking was more along the lines of a big Frankenstein switch for shore powerMost of the 48 volt inverter/chargers/transfer switches will be split phase.
Which is a consideration if you are going to make provisions for shore power.
Another consideration related to shore power is a switchable neutral/ground bond.
One more thing to consider is low frequency vs high frequency.
Low freguency inverters heavy and expensive but they handle surge loads much better.
For a 3000 watt inverter 12 volts isn't really a good choice but 24 volts is ok.
Hope that helps.
Yes a lot to consider, but I think I'm probably going to go with 24V/3000W. Thanks for the good advice - hadn't considered the neutral/ground bond - I have a lot to learn - my thinking was more along the lines of a big Frankenstein switch for shore power
Sounds expensive. It seems that 48V stuff is a little out of my range for an RV. Looking at the ROI a 24V system hits the sweet spot. I think I can do a 24V/1200W(solar)/2-3k inverter/7200Wh system for just over $4k. Prove I’m wrongThe Aims 6,000 watt 48 volt inverter connects/disconnects the neutral ground bond automatically when you connect to shore power. Easy.
Doubting Thomas! Only proof is to do it, I’m not counting money I’ll spend making mistakes but on paper I think it’s feasible.Prove you are right...
Doubting Thomas! Only proof is to do it, I’m not counting money I’ll spend making mistakes but on paper I think it’s feasible.
Well I'm just a noobie poking around for information but I think Will Prowse is a trustable source and I found this on his site: http://s.click.aliexpress.com/e/KuqogXnE thats 7680Wh for about $1800. Not saying that's the way I'll go but it puts me below budget. His 24V design with diy battery bank would put me at around $3800, need to add an ats to that so around $4K. Of course I could kill myself in the process.....Okay let us know when you are done ;-)
There are plenty of cheap options out there if that's how you want to go -- but your battery need is probably only doable with used junk or golf cart batteries.
Well I'm just a noobie poking around for information but I think Will Prowse is a trustable source and I found this on his site: http://s.click.aliexpress.com/e/KuqogXnE thats 7680Wh for about $1800. Not saying that's the way I'll go but it puts me below budget. His 24V design with diy battery bank would put me at around $3800, need to add an ats to that so around $4K. Of course I could kill myself in the process.....
From the information I have, it seems that the all-in-ones in general and the MPP in particular have a high standby current and not recommended for extended inverter use. I would be running a heat pump on inverter all the time with hopefully most of time on standby. Will Prowse mentioned in one of his videos that you would need 400W solar just to run standby.I like your enthusiasm. Why don't you get an inverter/charger with the transfer switch built into it? Just curious. Or an MPP Solar unit.
From the information I have, it seems that the all-in-ones in general and the MPP in particular have a high standby current and not recommended for extended inverter use. I would be running a heat pump on inverter all the time with hopefully most of time on standby. Will Prowse mentioned in one of his videos that you would need 400W solar just to run standby.